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Cooling rates in the shock veins of chondrites: constraints on the (Mg, Fe)2SiO4 polymorph transformations
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chen, Ming Xie, Xiande Goresy, Ahmed El Wopenka, Brigitte Sharp, Thomas G. |
| Copyright Year | 1998 |
| Abstract | The occurrence of γ-phase, a high-pressure polymorph of olivine (α-phase), in the shock veins of Sixiangkou chondrite was due to a greater cooling rate (> 10 000°C·s-1) in the veins. Because γ-phase partially reverted to β-phase and no back-transformation from β-phase to α-phase took place, the shock veins of Peace River chondrite with a cooling rate of 1 000–2 000δC·s-1 contain a great amount of β-phase. In the shock veins of Mbale chondrite with a cooling rate of <500°C·s-1, the majority of γ-phase reverted to α-phase. The heat dissipation in shock veins took place after a stage of shock compression of chondrite parent body, and the parent body was broken into fragmental pieces. Cooling rate in the shock veins constrained the back-transformations of (Mg, Fe)2SiO4 high-pressure polymorphs. |
| Starting Page | 522 |
| Ending Page | 528 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/BF02877743 |
| Alternate Webpage(s) | https://page-one.springer.com/pdf/preview/10.1007/BF02877743 |
| Alternate Webpage(s) | https://doi.org/10.1007/BF02877743 |
| Volume Number | 41 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
